Solve:
9/x - 4/y = 2 (i)
15/x + 8/y = 7 (ii)
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for 1st question
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by taking lcm on first equation
9y-4x=2xy ------equation 3
by taking LCM on equation 2
15y-8x=7xy------equation 4
equation 3 is multiply with 2 then we get
18y-8x=4xy-----equation 5
subtract equation 5-equation 4
then we get
3y=-3xy
cancel 3y on both sides then we get x=-1
substitute x=-1 in equation 3 then we get
3y+4=-2y
y=-4/5,x=-1
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